The Cracker Dog Killer was a noteworthy animal of Florida, but questions arise as to what it was and whether it is still out there. It was in the habit of killing off dogs which tried to investigate its dwellings with their noses. What was it and was it a single animal or a population?
The latter seems likely. You rarely find animal species with a population of one. If a dog came near its den, the Dog Killer would eat it and fastidiously leave its bones in a pile nearby, including the skull.
A tidy cryptid, I'm sure you'll say.